Whats nice about it, is she's taken the once in a life time opportunity she will have to have a quiet wedding without having to invite hundreds of guest and 'live up to' the high society expectations of the expense dress etc etc. Getting married is more important than the sense of occasion.
Its reading the public mood a lot better in terms of PR and her father too.
The other thing is she looks relaxed and not pressured.
In terms of it being the Royal Family she has to ask the permission of her Grandmother, not her father to get married so the pictures make sense from that point of view (although we all know its about avoiding embarassing Dad pics - we don't know how she feels about it all either).
As for the dress, its beautiful and sentimental.
I think Beatrice would have been criticised whatever she did, but if the best thing you can find to criticise is you don't like the photos, I think she's pulled it off wonderfully. I hope that future Royal Weddings are much more like this, than the over blown money pits they normally are.
Besides, I'm sure she will have the huge reception at a later date anyway (and the Queen will be excused from attending which will probably suit everyone concerned).